The Characteristics of Heishan Structural Ophiolite Belt in the West Part of East Kunlun

Through research on the rock assemblage of basic volcanic rock and basic-ultrabasic volcanic rock as well as their feature on petrology,lithochemistry,trace element and REE etc,it is suggested that Heishan structural ophiolite belt is an important material component of Qimantage binding belt,which was formed gradually in the process of plate's dive-collision and connected with Nalinggele structural belt,and was the division fault between Qaidam basin and north block of East Kunlun.Comprehensive resear ches from isotopic dating have concluded that the Heishan ophiolite was formed in Nanhua Ordovician period and its structural location was formed in Silurian period-early Middle Devonian epoch.This paper provides new important information for the structural evolution of East Kunlun and indicates that in the Qimantage area (Qaidam basin),at the north of Heishan Structural Ophiolite Belt,generated some endogenetic deposits which were concerned with hydrothermal fluid and regionmet amorphism,such as copper,tungsten,titanium and iron,which were related to magmatic rocks and metamorphic rocks; and in the Kumukuli basin (the northern block of East Kunlun),at the south of Heishan Structural Ophio lite Belt,occur some exogenetic ore deposits,such as sandst one-conglomerate type copper deposits,placer gold,gypsum,and halite etc.